Replace Less with CSS (#23481)

Ran most of the Less files through the Less compiler and Prettier and
then followed up with a round of manual fixes.

The Less compiler had unfortunately stripped all `//` style comments
that I had to restore (It did preserve `/* */` comments). Other fixes
include duplicate selector removal which were revealed after the
transpilation and which weren't caught by stylelint before but now are.

Fixes: https://github.com/go-gitea/gitea/issues/15565

4 files changed, 0 insertions, 277 deletions

diff --git a/web_src/less/chroma/base.less b/web_src/less/chroma/base.less
deleted file mode 100644
index 597ee2a72d..0000000000
--- a/web_src/less/chroma/base.less
+++ /dev/null
@@ -1,50 +0,0 @@
-.chroma {
-  background-color: var(--color-code-bg);
-}
-
-/* LineTableTD */
-.chroma .lntd {
-  vertical-align: top;
-  padding: 0;
-  margin: 0;
-  border: 0;
-}
-
-/* LineTable */
-.chroma .lntable {
-  border-spacing: 0;
-  padding: 0;
-  margin: 0;
-  border: 0;
-  width: auto;
-  overflow: auto;
-  display: block;
-}
-
-/* LineHighlight */
-.chroma .hl {
-  display: block;
-  width: 100%;
-}
-
-/* LineNumbersTable */
-.chroma .lnt {
-  margin-right: .4em;
-  padding: 0 .4em;
-}
-
-/* LineNumbers */
-.chroma .ln {
-  margin-right: .4em;
-  padding: 0 .4em;
-}
-
-/* GenericStrong */
-.chroma .gs {
-  font-weight: 600;
-}
-
-/* GenericUnderline */
-.chroma .gl {
-  text-decoration: underline;
-}
diff --git a/web_src/less/chroma/chroma-style-diff.go b/web_src/less/chroma/chroma-style-diff.go
deleted file mode 100644
index 4243259689..0000000000
--- a/web_src/less/chroma/chroma-style-diff.go
+++ /dev/null
@@ -1,79 +0,0 @@
-// Copyright 2023 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-//go:build ignore
-
-/*
-This tool is used to compare the CSS names in a chroma builtin styles with the Gitea theme CSS names.
-
-It outputs the difference between the two sets of CSS names, eg:
-
-```
-CSS names not in builtin:
-.chroma .ln
-----
-Builtin CSS names not in file:
-.chroma .vm
-```
-
-Developers could use this tool to re-sync the CSS names in the Gitea theme.
-*/
-
-package main
-
-import (
-	"os"
-	"regexp"
-	"strings"
-
-	"github.com/alecthomas/chroma/v2"
-)
-
-func main() {
-	if len(os.Args) != 2 {
-		println("Usage: chroma-style-diff css-or-less-file")
-		os.Exit(1)
-	}
-
-	data, err := os.ReadFile(os.Args[1])
-	if err != nil {
-		println(err.Error())
-		os.Exit(1)
-	}
-
-	content := string(data)
-
-	// a simple CSS parser to collect CSS names
-	content = regexp.MustCompile("//.*\r?\n").ReplaceAllString(content, "\n")
-	content = regexp.MustCompile("/\\*.*?\\*/").ReplaceAllString(content, "")
-	matches := regexp.MustCompile("\\s*([-.#:\\w\\s]+)\\s*\\{[^}]*}").FindAllStringSubmatch(content, -1)
-
-	cssNames := map[string]bool{}
-	for _, matchGroup := range matches {
-		cssName := strings.TrimSpace(matchGroup[1])
-		cssNames[cssName] = true
-	}
-
-	// collect Chroma builtin CSS names
-	builtin := map[string]bool{}
-	for tokenType, cssName := range chroma.StandardTypes {
-		if tokenType > 0 && cssName != "" {
-			builtin[".chroma ."+cssName] = true
-		}
-	}
-
-	// show the diff
-	println("CSS names not in builtin:")
-	for cssName := range cssNames {
-		if !builtin[cssName] {
-			println(cssName)
-		}
-	}
-	println("----")
-	println("Builtin CSS names not in file:")
-	for cssName := range builtin {
-		if !cssNames[cssName] {
-			println(cssName)
-		}
-	}
-}
diff --git a/web_src/less/chroma/dark.less b/web_src/less/chroma/dark.less
deleted file mode 100644
index 1b0c722a16..0000000000
--- a/web_src/less/chroma/dark.less
+++ /dev/null
@@ -1,74 +0,0 @@
-.chroma .bp { color: #fabd2f; } /* NameBuiltinPseudo */
-.chroma .c { color: #777e94; } /* Comment */
-.chroma .c1 { color: #777e94; } /* CommentSingle */
-.chroma .ch { color: #777e94; } /* CommentHashbang */
-.chroma .cm { color: #777e94; } /* CommentMultiline */
-.chroma .cp { color: #8ec07c; } /* CommentPreproc */
-.chroma .cpf { color: #649bc4; } /* CommentPreprocFile */
-.chroma .cs { color: #9075cd; } /* CommentSpecial */
-.chroma .dl { color: #649bc4; } /* LiteralStringDelimiter */
-.chroma .fm {} /* NameFunctionMagic */
-.chroma .g {} /* Generic */
-.chroma .gd { color: #ffffff; background-color: #5f3737; } /* GenericDeleted */
-.chroma .ge { color: #ddee30; } /* GenericEmph */
-.chroma .gh { color: #ffaa10; } /* GenericHeading */
-.chroma .gi { color: #ffffff; background-color: #3a523a; } /* GenericInserted */
-.chroma .gl {} /* GenericUnderline */
-.chroma .go { color: #777e94; } /* GenericOutput */
-.chroma .gp { color: #ebdbb2; } /* GenericPrompt */
-.chroma .gr { color: #ff4433; } /* GenericError */
-.chroma .gs { color: #ebdbb2; } /* GenericStrong */
-.chroma .gt { color: #ff7540; } /* GenericTraceback */
-.chroma .gu { color: #b8bb26; } /* GenericSubheading */
-.chroma .il { color: #649bc4; } /* LiteralNumberIntegerLong */
-.chroma .k { color: #ff7540; } /* Keyword */
-.chroma .kc { color: #649bc4; } /* KeywordConstant */
-.chroma .kd { color: #ff7540; } /* KeywordDeclaration */
-.chroma .kn { color: #ffaa10; } /* KeywordNamespace */
-.chroma .kp { color: #5f8700; } /* KeywordPseudo */
-.chroma .kr { color: #ff7540; } /* KeywordReserved */
-.chroma .kt { color: #ff7b72; } /* KeywordType */
-.chroma .l {} /* Literal */
-.chroma .ld {} /* LiteralDate */
-.chroma .m { color: #649bc4; } /* LiteralNumber */
-.chroma .mb { color: #649bc4; } /* LiteralNumberBin */
-.chroma .mf { color: #649bc4; } /* LiteralNumberFloat */
-.chroma .mh { color: #649bc4; } /* LiteralNumberHex */
-.chroma .mi { color: #649bc4; } /* LiteralNumberInteger */
-.chroma .mo { color: #649bc4; } /* LiteralNumberOct */
-.chroma .n { color: #c9d1d9; } /* Name */
-.chroma .na { color: #b8bb26; } /* NameAttribute */
-.chroma .nb { color: #fabd2f; } /* NameBuiltin */
-.chroma .nc { color: #ffaa10; } /* NameClass */
-.chroma .nd { color: #8ec07c; } /* NameDecorator */
-.chroma .ne { color: #ff7540; } /* NameException */
-.chroma .nf { color: #fabd2f; } /* NameFunction */
-.chroma .ni { color: #fabd2f; } /* NameEntity */
-.chroma .nl { color: #ff7540; } /* NameLabel */
-.chroma .nn { color: #ffaa10; } /* NameNamespace */
-.chroma .no { color: #649bc4; } /* NameConstant */
-.chroma .nt { color: #ff7540; } /* NameTag */
-.chroma .nv { color: #ebdbb2; } /* NameVariable */
-.chroma .nx { color: #b6bac5; } /* NameOther */
-.chroma .o { color: #ff7540; } /* Operator */
-.chroma .ow { color: #5f8700; } /* OperatorWord */
-.chroma .p { color: #d2d4db; } /* Punctuation */
-.chroma .py {} /* NameProperty */
-.chroma .s { color: #b8bb26; } /* LiteralString */
-.chroma .s1 { color: #b8bb26; } /* LiteralStringSingle */
-.chroma .s2 { color: #b8bb26; } /* LiteralStringDouble */
-.chroma .sa { color: #649bc4; } /* LiteralStringAffix */
-.chroma .sb { color: #b8bb26; } /* LiteralStringBacktick */
-.chroma .sc { color: #649bc4; } /* LiteralStringChar */
-.chroma .sd { color: #777e94; } /* LiteralStringDoc */
-.chroma .se { color: #ff7540; } /* LiteralStringEscape */
-.chroma .sh { color: #649bc4; } /* LiteralStringHeredoc */
-.chroma .si { color: #ffaa10; } /* LiteralStringInterpol */
-.chroma .sr { color: #9075cd; } /* LiteralStringRegex */
-.chroma .ss { color: #ff7540; } /* LiteralStringSymbol */
-.chroma .sx { color: #ffaa10; } /* LiteralStringOther */
-.chroma .vc { color: #ff7540; } /* NameVariableClass */
-.chroma .vg { color: #ffaa10; } /* NameVariableGlobal */
-.chroma .vi { color: #ffaa10; } /* NameVariableInstance */
-.chroma .vm {} /* NameVariableMagic */
-.chroma .w { color: #7f8699; } /* TextWhitespace */
diff --git a/web_src/less/chroma/light.less b/web_src/less/chroma/light.less
deleted file mode 100644
index 4bfce8fe71..0000000000
--- a/web_src/less/chroma/light.less
+++ /dev/null
@@ -1,74 +0,0 @@
-.chroma .bp { color: #999999; } /* NameBuiltinPseudo */
-.chroma .c { color: #6a737d; } /* Comment */
-.chroma .c1 { color: #6a737d; } /* CommentSingle */
-.chroma .ch { color: #6a737d; } /* CommentHashbang */
-.chroma .cm { color: #999988; } /* CommentMultiline */
-.chroma .cp { color: #109295; } /* CommentPreproc */
-.chroma .cpf { color: #4c4dbc; } /* CommentPreprocFile */
-.chroma .cs { color: #999999; } /* CommentSpecial */
-.chroma .dl { color: #106303; } /* LiteralStringDelimiter */
-.chroma .fm {} /* NameFunctionMagic */
-.chroma .g {} /* Generic */
-.chroma .gd { color: #000000; background-color: #ffdddd; } /* GenericDeleted */
-.chroma .ge { color: #000000; } /* GenericEmph */
-.chroma .gh { color: #999999; } /* GenericHeading */
-.chroma .gi { color: #000000; background-color: #ddffdd; } /* GenericInserted */
-.chroma .gl {} /* GenericUnderline */
-.chroma .go { color: #888888; } /* GenericOutput */
-.chroma .gp { color: #555555; } /* GenericPrompt */
-.chroma .gr { color: #aa0000; } /* GenericError */
-.chroma .gs {} /* GenericStrong */
-.chroma .gt { color: #aa0000; } /* GenericTraceback */
-.chroma .gu { color: #aaaaaa; } /* GenericSubheading */
-.chroma .il { color: #009999; } /* LiteralNumberIntegerLong */
-.chroma .k { color: #d73a49; } /* Keyword */
-.chroma .kc { color: #d73a49; } /* KeywordConstant */
-.chroma .kd { color: #d73a49; } /* KeywordDeclaration */
-.chroma .kn { color: #d73a49; } /* KeywordNamespace */
-.chroma .kp { color: #d73a49; } /* KeywordPseudo */
-.chroma .kr { color: #d73a49; } /* KeywordReserved */
-.chroma .kt { color: #445588; } /* KeywordType */
-.chroma .l {} /* Literal */
-.chroma .ld {} /* LiteralDate */
-.chroma .m { color: #009999; } /* LiteralNumber */
-.chroma .mb { color: #009999; } /* LiteralNumberBin */
-.chroma .mf { color: #009999; } /* LiteralNumberFloat */
-.chroma .mh { color: #009999; } /* LiteralNumberHex */
-.chroma .mi { color: #009999; } /* LiteralNumberInteger */
-.chroma .mo { color: #009999; } /* LiteralNumberOct */
-.chroma .n {} /* Name */
-.chroma .na { color: #d73a49; } /* NameAttribute */
-.chroma .nb { color: #005cc5; } /* NameBuiltin */
-.chroma .nc { color: #445588; } /* NameClass */
-.chroma .nd { color: #3c5d5d; } /* NameDecorator */
-.chroma .ne { color: #990000; } /* NameException */
-.chroma .nf { color: #005cc5; } /* NameFunction */
-.chroma .ni { color: #6f42c1; } /* NameEntity */
-.chroma .nl { color: #990000; } /* NameLabel */
-.chroma .nn { color: #555555; } /* NameNamespace */
-.chroma .no { color: #008080; } /* NameConstant */
-.chroma .nt { color: #22863a; } /* NameTag */
-.chroma .nv { color: #008080; } /* NameVariable */
-.chroma .nx { color: #24292e; } /* NameOther */
-.chroma .o { color: #d73a49; } /* Operator */
-.chroma .ow { color: #d73a49; } /* OperatorWord */
-.chroma .p {} /* Punctuation */
-.chroma .py {} /* NameProperty */
-.chroma .s { color: #106303; } /* LiteralString */
-.chroma .s1 { color: #cc7a00; } /* LiteralStringSingle */
-.chroma .s2 { color: #106303; } /* LiteralStringDouble */
-.chroma .sa { color: #106303; } /* LiteralStringAffix */
-.chroma .sb { color: #106303; } /* LiteralStringBacktick */
-.chroma .sc { color: #106303; } /* LiteralStringChar */
-.chroma .sd { color: #106303; } /* LiteralStringDoc */
-.chroma .se { color: #106303; } /* LiteralStringEscape */
-.chroma .sh { color: #106303; } /* LiteralStringHeredoc */
-.chroma .si { color: #106303; } /* LiteralStringInterpol */
-.chroma .sr { color: #22863a; } /* LiteralStringRegex */
-.chroma .ss { color: #106303; } /* LiteralStringSymbol */
-.chroma .sx { color: #106303; } /* LiteralStringOther */
-.chroma .vc { color: #008080; } /* NameVariableClass */
-.chroma .vg { color: #008080; } /* NameVariableGlobal */
-.chroma .vi { color: #008080; } /* NameVariableInstance */
-.chroma .vm {} /* NameVariableMagic */
-.chroma .w { color: #bbbbbb; } /* TextWhitespace */